The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2011
Filed:
Jul. 24, 2007
Ryo Nakabayashi, Niigata-ken, JP;
Naoya Hasegawn, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Masahiko Ishizone, Niigata-ken, JP;
Yosuke Ide, Niigata-ken, JP;
Takuya Seino, Niigata-ken, JP;
Kazumasa Nishimura, Niigata-ken, JP;
Ryo Nakabayashi, Niigata-ken, JP;
Naoya Hasegawn, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Masahiko Ishizone, Niigata-ken, JP;
Yosuke Ide, Niigata-ken, JP;
Takuya Seino, Niigata-ken, JP;
Kazumasa Nishimura, Niigata-ken, JP;
TDK Corporation, Tokyo, JP;
Abstract
A tunneling magnetic sensing element is provided, in which an increase in the magnetostriction of a free magnetic layer is reduced and the rate of change in resistance is high. A laminate Tconstituting the tunneling magnetic sensing element includes a portion in which a pinned magnetic layer, a barrier layer, and a free magnetic layer are disposed in that order from the bottom. An enhancing layer disposed on the barrier layer side of the free magnetic layer includes a first enhancing layer on the barrier layer side and a second enhancing layer on the soft magnetic layer side, and the Fe content of a CoFe alloy constituting the first enhancing layer is specified to be larger than the Fe content of the CoFe alloy of the second enhancing layer.